The invention discloses a heat dissipation device of a mobile terminal including a housing having an electrical cavity and a circuit board enclosed in the electrical cavity and having a vibration motor and at least two connectors, The shell is provided with a connector hole communicating with the connector body one by one, the output shaft of the vibration motor is sleeved with an eccentric wheeland is connected with the fan, the output shaft is provided with a transmission spring piece connected with the eccentric wheel, and the transmission spring piece is slidably connected or fixedly connected with the eccentric wheel respectively following the positive and negative reversals of the output shaft; The circuit board is provided with a partition plate which divides the electrical cavityinto two heat dissipation spaces, the two heat dissipation spaces are communicated with each other through a fan, and at least one connector is arranged in each heat dissipation space. The invention also discloses a mobile terminal including the heat dissipation device of the mobile terminal. The invention has the advantages that the vibration motor can both vibrate and drive the fan to dissipateheat through the transmission spring, and the plug-in body is used as the inlet and outlet of the cooling airflow, the structure is simple and the price is low, and the heat dissipation efficiency isimproved.